Flatpak: Generic Wayland icon is shown in KDE task switcher

[mss]

Describe the bug
On KDE, when you use Alt+Tab to switch between applications in a Wayland session the generic Wayland icon is shown.

This is probably caused by some metadata missing in the package.json (see below).

To Reproduce
Steps to reproduce the behavior:

1. Log in to a KDE Plasma 6 Wayland session
2. Install and start the flatpak
3. Press and hold Alt+Tab
4. See generic yellow wayland icon

Expected behavior
The same icon as in the task manager should be displayed.

Screenshots
Can't take a screenshot of the task switcher

Desktop (please complete the following information):

• OS: KDE Neon
• Installation package: Flatpak
• Version: 1.11.5

Additional context

According to https://docs.flatpak.org/en/latest/electron.html#using-correct-desktop-file-name should this be fixed by adding a line

  "desktopName": "com.github.IsmaelMartinez.teams_for_linux.desktop",

to the file package.json. But only for the flatpak builds.

[IsmaelMartinez]

Thanks for reporting. Do you know how to do this in flatpak? The manifest we use is in here: https://github.com/flathub/com.github.IsmaelMartinez.teams_for_linux/blob/master/com.github.IsmaelMartinez.teams_for_linux.yml

[mss]

Theoretically yes: I think all what has to happen is that the package.json is amended with that line.

So I guess some jq magic in build-commands should do the trick. But I have no idea where that package.json is found...

Hmmm... that documentation also mentions some patch-desktop-filename helper which should probably called after that desktop-file-edit command. I digged around a bit and I think it should be as simple as calling

patch-desktop-filename ${FLATPAK_DEST}/teams-for-linux/resources/app.asar